<div dir="ltr">Well, I wouldnt say "send a postfix error" to the sender. I would use the error message to determine what the problem is. (eg, "your hostname has no DNS record", or "your hostname has an illegal character", etc) and then tell them THAT.<div>
<br></div><div>Perhaps there is some documentation for postfix that might explain what that error means. I am used to SMTP servers that give specific information when they log an error that identifies exactly what the cause is.</div>
<div><br></div><div>I also make it a point to know exactly what conditions under which a server I run does or does not accept mail from sender hosts.</div><div><br></div><div>I'm assuming you've done the basics and verified that the sender is sending to the correct address, and that their email client is properly configured with their valid sender address. Do you know if your server rejects ALL mail from this sending server, or just from this one user? </div>
<div><br></div><div>If you'd like to get more information about the SMTP transaction from this problematic sender, I could setup a temporary address on a server under my control, and you could have your sender attempt to email it. If mine rejects it, I would be able to tell you exactly why. If it accepts it, I may be able to provide details about the transaction that might help you identify why your server is rejecting it.</div>
<div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 10, 2013 at 11:56 AM, L. V. Lammert <span dir="ltr"><<a href="mailto:lvl@omnitec.net" target="_blank">lvl@omnitec.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Tue, 10 Sep 2013, megadave wrote:<br>
<br>
> Does your receiver-SMTP not log the transactions, and provide specific<br>
> details for cases where it rejects?<br>
><br>
</div>Sure, .. Postfix dutifully logs the error "Hostname not found"; *however*<br>
there is no definitive souce that I have been able to identify as to WHY<br>
Postfix identifies that error.<br>
<div class="im"><br>
> It is certainly always better if you can specifically describe what the<br>
> sending server is doing wrong.<br>
><br>
</div>Bingo! That's what I would like to do! Send a Postfix error to some dork<br>
that thinks THEIR email server is configured properly is useless; what I<br>
am looking for is a detailed explanation of the causes for such errors.<br>
<div class="im"><br>
> Ultimately, if the sender wishes to be able to send to you, it may come<br>
> down to them demanding that their server operator identify and fix the<br>
> problem.<br>
><br>
</div>Been there, tried that - the response is typically "we don't have a<br>
problem - it's YOUR problem because YOUR server is rejecting OUR email".<br>
<br>
Hence the discussion on a more definitive source of the problem.<br>
<div class="HOEnZb"><div class="h5"><br>
Lee<br>
_______________________________________________<br>
grlug mailing list<br>
<a href="mailto:grlug@grlug.org">grlug@grlug.org</a><br>
<a href="http://shinobu.grlug.org/cgi-bin/mailman/listinfo/grlug" target="_blank">http://shinobu.grlug.org/cgi-bin/mailman/listinfo/grlug</a><br>
</div></div></blockquote></div><br></div>